How do you convert Kelvin to Fahrenheit?

• A. F = (K - 273) x 1.8 + 32
• B. F = (K + 273) x 1.8 + 32
• C. F = (K - 273.15) x 1.8 + 32
• D. F = K x 1.8 + 32

Answer: (C)

To convert Kelvin to Fahrenheit, the correct formula involves first adjusting the Kelvin temperature by subtracting 273.15, which accounts for the offset between the Kelvin and Celsius scales, since 0 K is equivalent to -273.15 °C. Following this adjustment, the result is then multiplied by 1.8, which is the conversion factor between Celsius and Fahrenheit, and finally, 32 is added to account for the freezing point of water in Fahrenheit.

This method ensures that the absolute zero in Kelvin (-273.15 °C) appropriately reflects the freezing point of water at 32 °F. The process effectively transitions the temperature from an absolute scale to the Fahrenheit scale, maintaining accuracy throughout the conversion.

The other formulas do not correctly account for the conversion from Kelvin to Fahrenheit, either because they use incorrect adjustments for the temperature scale or omit necessary calculations for accurate conversion.